​​Currently the registration is open to people willing to access HTGR code package. 

Register to Access HTGR Code Package​

The contents of Registered Users Area are restricted to registered users of the ONCORE. The registration is completed as follows:

• Go to http://nucleus.iaea.org and fill the form available in the upper right corner, by clicking on "Register".
  
• An email will be sent to you shortly after your registration. Click on the link mentioned in the email to confirm your registration.
  
• Once your account is activated, please fill out this form
  
• Your request will be reviewed by the ONCORE team. As soon as your request is accepted you will receive an email notification.
• Additionaly, if you also need access to source code, please write an email to oncore@iaea.org with detailed explanation of the expected use (this will be done only after your request is approved)​.